/**
* @name: comment
* @author: surui
* @date: 2020-11-23 20:45
* @description：comment
* @update: 2020-11-23 20:45
*/
nav{
    width: 100%;
    height: 4em;
    background-color: #444444;
    color: #d9edf7;
    text-align: center;
    line-height: 4em;
}
nav h3{
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 2em;
    font-weight: 800;
    font-size: 30px;
    transition: 3s;
}
nav h3:hover{
    cursor: pointer;
    transform: scale(1.5);
}
nav a{
    float: left;
    display: block;
    width: 50px;
    height: 50px;
    text-align: center;
    color: #fff;
    margin-top: 1.5em;
    margin-left: 1.5em;
    transition: all 3s;
}
nav a:hover{
    text-decoration: none;
    transform: translateX(-20px) scale(1.2);
    color: deeppink;
}
.liuyanban{
    position: relative;
    width: 100%;
    height: 500px;
    text-align: center;
}
.liuyanban .commit{
    width: 80%;
    height: 90%;
    border: 1px solid pink;
    box-shadow: 0 0  50px rgba(0,0,0, .5);
}

.liuyanban .commit:focus{
    outline:none;
    border: 20px solid skyblue;
}
.liuyanban .author{
    position: absolute;
    right: 0;
    top: 1em;
    width: 2em;
    height: 2em;
    border: 1px solid pink;
    box-shadow: 0 0 10px rgba(0,0,0, .5);
}
.liuyanban .btn{
    position: relative;
    width:10em;
    transition:all .3s;
    text-align: center;
    background-color: #666;
    border-radius: 6px;
    border: 0;
    color: #fff;
    cursor: pointer;
    height: 3em;
    line-height: 3em;
    text-decoration: none;
    margin:auto 40%;
}
.btn:before,.btn:after{
    position:absolute;
    content:'';
    display:block;
    width:140%;
    height:100%;
    left:-20%;
    z-index:-1000;
    transition:all ease-in-out .5s;
    background-repeat:no-repeat
}
.btn:before{
    display:none;
    top:-75%;
    background-image:radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,transparent 20%,#fff 20%,transparent 30%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,transparent 10%,#fff 15%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%);
    background-size:10% 10%,20% 20%,15% 15%,20% 20%,18% 18%,10% 10%,15% 15%,10% 10%,18% 18%
}
.btn:after{
    display:none;
    bottom:-75%;
    background-image:radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,transparent 10%,#fff 15%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%),
    radial-gradient(circle,#fff 20%,transparent 20%);
    background-size:15% 15%,20% 20%,18% 18%,20% 20%,15% 15%,10% 10%,20% 20%
}
.btn:active{
    transform:scale(0.9);
    background-color:#fff;
    box-shadow:0 2px 25px rgba(112,128,144,0.2)
}
.btn.animate:before{
    display:block;
    animation:topBubbles ease-in-out .5s forwards
}
.btn.animate:after{
    display:block;
    animation:bottomBubbles ease-in-out .5s forwards
}
@keyframes topBubbles{
    0%{
        background-position:5% 90%,10% 90%,10% 90%,15% 90%,25% 90%,25% 90%,40% 90%,55% 90%,70% 90%
    }
    50%{
        background-position:0 80%,0 20%,10% 40%,20% 0,30% 30%,22% 50%,50% 50%,65% 20%,90% 30%
    }
    100%{
        background-position:0 70%,0 10%,10% 30%,20% -10%,30% 20%,22% 40%,50% 40%,65% 10%,90% 20%;
        background-size:0 0,0 0,0 0,0 0,0 0,0 0
    }
}
@keyframes bottomBubbles{
    0%{
        background-position:10% -10%,30% 10%,55% -10%,70% -10%,85% -10%,70% -10%,70% 0
    }
    50%{
        background-position:0 80%,20% 80%,45% 60%,60% 100%,75% 70%,95% 60%,105% 0
    }
    100%{
        background-position:0 90%,20% 90%,45% 70%,60% 110%,75% 80%,95% 70%,110% 10%;
        background-size:0 0,0 0,0 0,0 0,0 0,0 0
    }
}
.liuyanban button canvas{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.25;
}
.btn a{
    position: absolute;
    top: 1.5em;
    left: 50%;
    text-decoration: none;
    color: #fff;
    text-align: center;
    transform: translate(-50%,-50%);
}
#shafa{
    margin: 10px auto;
}
#shafa li{
    list-style-position: inside;
    list-style-type:  square;
    background-color: pink;
}
#shafa li a{
    float: right;
}